зеркало из https://github.com/wieslawsoltes/SVG.git
113 строки
4.1 KiB
C#
113 строки
4.1 KiB
C#
#if !NO_SDC
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Text;
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using System.Linq;
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using System.Runtime.InteropServices;
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namespace Svg
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{
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/// <summary>
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/// Manages access to <see cref="SystemFonts"/> and any privately loaded fonts.
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/// When a font is requested in the render process, if the font is not found as an embedded SvgFont, the render
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/// process will SvgFontManager.FindFont method.
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/// </summary>
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public class SvgFontManager : IDisposable
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{
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private static readonly string[][] defaultLocalizedFamilyNames = new string[][]
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{
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// Japanese
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new string[]{ "Meiryo", "メイリオ", },
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new string[]{ "MS Gothic", "ＭＳ ゴシック", },
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new string[]{ "MS Mincho", "ＭＳ 明朝", },
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};
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public static List<string[]> LocalizedFamilyNames { get; private set; } = new List<string[]>();
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public static List<string> PrivateFontPathList { get; private set; } = new List<string>();
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public static List<byte[]> PrivateFontDataList { get; private set; } = new List<byte[]>();
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private readonly List<FontFamily> families = new List<FontFamily>();
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private readonly List<string[]> localizedFamilyNames = new List<string[]>();
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internal SvgFontManager()
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{
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families.AddRange(FontFamily.Families);
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#if !NETSTANDARD
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using (var privateFontCollection = new PrivateFontCollection())
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{
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foreach (var path in PrivateFontPathList)
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privateFontCollection.AddFontFile(path);
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foreach (var data in PrivateFontDataList)
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{
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var memory = IntPtr.Zero;
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try
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{
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memory = Marshal.AllocCoTaskMem(data.Length);
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Marshal.Copy(data, 0, memory, data.Length);
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privateFontCollection.AddMemoryFont(memory, data.Length);
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}
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finally
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{
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if (memory != IntPtr.Zero)
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Marshal.FreeCoTaskMem(memory);
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}
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}
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families.AddRange(privateFontCollection.Families);
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}
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#endif
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localizedFamilyNames.AddRange(LocalizedFamilyNames);
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localizedFamilyNames.AddRange(defaultLocalizedFamilyNames);
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}
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/// <summary>
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/// This method searches a dictionary of fonts (pre loaded with the system fonts). If a
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/// font can't be found and a callback has been provided - then the callback should perform
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/// any validation and return a font (or null if not found/error).
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/// Where a font can't be located it is the responsibility of the caller to perform any
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/// exception handling.
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/// </summary>
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/// <param name="name">A <see cref="string"/> containing the FamilyName of the font.</param>
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/// <returns>An <see cref="FontFamily"/> of the loaded font or null is not located.</returns>
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public FontFamily FindFont(string name)
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{
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if (name == null)
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return null;
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var familyNames = localizedFamilyNames.Find(f => f.Contains(name, StringComparer.CurrentCultureIgnoreCase))
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?? Enumerable.Repeat(name, 1);
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foreach (var familyName in familyNames)
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{
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var family = families.Find(f => f.Name.Equals(familyName, StringComparison.CurrentCultureIgnoreCase));
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if (family != null)
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return family;
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}
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switch (name.ToLower())
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{
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case "serif":
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return FontFamily.GenericSerif;
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case "sans-serif":
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return FontFamily.GenericSansSerif;
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case "monospace":
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return FontFamily.GenericMonospace;
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}
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return null;
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}
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public void Dispose()
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{
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families.ForEach(f => f.Dispose());
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}
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}
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}
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#endif
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